Heart|Natural|GIA

0.55ct F SI1 Heart Natural Diamond

EX • F/SI1 • GIA 6551318492

Certificate GIA 6551318492

Diamond specifications and retailer prices

From $482 USD
As of November 6, 2026
Save $139 USD (22%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: $621 USD at Blue Nile · As of November 5, 2026
View at Blue Nile

About this 0.55ct natural heart diamond

This 0.55ct natural heart sits in the half to three-quarter carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6551318492. Listed at 4 retailers as of November 5, 2026, with prices from $482 to $621, a $139 spread on the same certified stone. Blue Nile lists it at $621. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

0.55
Carat
F
Color
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6551318492
Dimensions4.97 × 5.79 × 3.41 mm
L/W Ratio1.16
Culet sizeNone
Key to symbols
Cloud, Crystal, Feather
Top View
4.97 mm5.79 mm0.55 ctF / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6551318492
Side View
Table 60.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 58.9%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $621 USD|Low: $423 USD|High: $675 USD|Avg: $560 USD|-8.0%
Blue Nile
Retailer 2
Retailer 3
Retailer 4
November 6, 2026
Retailer 3$482 USD
Retailer 4$526 USD
Retailer 2$600 USD
Blue Nile$621 USD

41 data points across 4 retailers

4 retailers$482 USD to $621 USD

A
Cheapest Retailer
-
$482 USD
Final sale: no returns
A
Retailer 2
-
$526 USD
View
B+
Retailer 3
-
$600 USD
View
Most Expensive
B+
Blue Nile
29212920 · Nov 5
$621 USD
View
3 more retailers have this diamond
Prices start from $482 USDSave up to $139 USD

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

A
0.55ct Heart
$482 USD